[Amps] 240V Outlet

[Scott McGrath]

Yes - but an amp at contest time usually runs more than 3 hours at a shot.

When I rewired the shack I used EMT so that in the event electical needs changed I could just pull new wires.  Installing EMT was a pain but it was worth it along with the halo ground with rods every 10'

I installed a bunch of 240 volt circuits for amps as the all seem to be happier when running on 240 nominal

And there are 240 volt wiring devices which are not twist lock like the 6-20 which is used for air conditioners.   Twist lock is best applied in vibration scenarios OR when you don't want the cleaning people plugging in neither situation applies to the average shack

Scott N1JIN

-----Original Message-----

From:  "jimsmitheguard-a at yahoo.com" <jimsmitheguard-a at yahoo.com>
Subj:  Re: [Amps] 240V Outlet
Date:  Wed Aug 12, 2009 20:39
Size:  1K
To:  "amps at contesting.com" <amps at contesting.com>

Correct, but I was trying not to complicate the matter more. This applies to continuous loads. That's something intended to run more than 3 hours straight. 
  
The data centers usually have 100% rated breakers on the feeders to avoid this derating, but not on the branch circuits. 
  
Jim Smith, EE 
KQ6UV 
 
--- On Wed, 8/12/09, Scott McGrath <mcgrath at fas.harvard.edu> wrote: 
 
 
From: Scott McGrath <mcgrath at fas.harvard.edu> 
Subject: Re: [Amps] 240V Outlet 
To: "jimsmitheguard-a at yahoo.com" <jimsmitheguard-a at yahoo.com>, "amps at contesting.com" <amps at contesting.com> 
Date: Wednesday, August 12, 2009, 5:28 PM 
 
 
One fact lost in the 15 vs 20 amp outlet discussion is the NEC requires you to derate any circuit to 80pct of its full load capacity for loads which are steady state.   So a 20A circuit is allowed only to have 16A drawn.   In data centers we have to abide by this rule 
_______________________________________________ 
Amps mailing list 
Amps at contesting.com 
http://lists.contesting.com/mailman/listinfo/amps